Externally-connected oil-gas-water three-phase separator device and liquid density measuring method

A technology of liquid density and measurement method, applied in separation methods, chemical instruments and methods, and determination of specific gravity by measuring pressure difference, can solve problems such as inability to accurately measure the true density of liquids, inability to obtain liquid density in time, and achieve convenient The effect of automatic control

Inactive Publication Date: 2015-05-20
PETROCHINA CO LTD
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  • Claims
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Problems solved by technology

This has the following problems, one is that the liquid density cannot be obtained in time; the other is that there is a certain time interval between sampling and measurement, and the true density of the liquid at that time may not be accurately measured due to changes in the liquid itself.

Method used

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  • Externally-connected oil-gas-water three-phase separator device and liquid density measuring method

Examples

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Embodiment 1

[0023] Example 1: Such as figure 1 Shown, a liquid density measurement method, especially for the measurement of liquid density in large containers.

[0024] A liquid density measurement method, used to measure the density of the liquid in the container in real time. The double flange level gauge is installed in the container, and the double flange level gauge is at the liquid level under the actual working pressure and temperature conditions. The pressure difference under the full scale and the pressure difference under the zero scale of the liquid level, and the density of the measured liquid is obtained by the following formula: P Full gap -P Zero difference =ρ liquid gΔh; where, P Full gap Is the differential pressure of the full-scale flange level gauge when the liquid level exceeds the pressure port on the double flange level gauge; P Zero difference Is the differential pressure of the flange liquid level gauge when the liquid level is lower than the lower pressure port ...

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Abstract

The invention discloses an externally-connected oil-gas-water three-phase separator device and a liquid density measuring method, and belongs to the chemical technical field. The liquid density measuring method is used for measuring the density of liquid in a container in real time, and comprises the following steps: designing a double-flange liquid level meter in the container, measuring pressure difference of the double-flange liquid level meter under the liquid-level full range of the liquid and pressure difference of the double-flange liquid level meter under the liquid-level zero-range of the liquid by measuring practical working pressure and temperature, and obtaining the density of the measured liquid according to the following formula: P full difference-P zero difference=rho liquid g deltah, wherein the P full difference is difference pressure of the full-range flange liquid level meter when the liquid level exceeds an upper drawing pressure hole in the double-flange liquid level meter, the P zero difference is the difference pressure of the flange liquid level meter when the liquid level is lower than a lower drawing pressure hole in the double-flange liquid level meter, the rho is the measured liquid density, the g is the gravitational acceleration, and deltah is the vertical height (m) between the two drawing pressure holes in the double-flange liquid level meter.

Description

Technical field [0001] The invention relates to an externally connected oil-gas-water three-phase separator device and a liquid density measurement method, belonging to the technical field of chemical industry. Background technique [0002] At present, the density of liquids is mostly measured in laboratories with related equipment. However, for some large containers, such as the oil, gas and water three-phase separator, the production site is mostly far away from the laboratory and other places. To measure the density of a liquid, you need to take a sample, and then take the sample to the laboratory for related measurement. This has the following problems. One is that the density of the liquid cannot be obtained in time; the other is that there is a certain time interval between sampling and measurement, and the true density of the liquid at that time may not be accurately measured due to changes in the liquid itself. [0003] The three-phase separator is an important equipment ...

Claims

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Application Information

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IPC IPC(8): G01N9/26B01D19/00B01D17/025
Inventor 许爱华牟晓波邹应勇崔兰德张靖院振刚祁小兵赵建彬
Owner PETROCHINA CO LTD
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